| 0,0 → 1,88 |
|---|
| #!/usr/bin/python |
| # |
| # Ctrl-Z Test: Start a shell, run a program, |
| # send SIGTSTP, wait for status msg, move in |
| # foreground, then send SIGINT, then exit |
| # |
| # Requires use of the following commands: |
| # |
| # ctrl-z control, fg, sleep |
| # |
| |
| import sys, imp, atexit |
| sys.path.append("/home/courses/cs3214/software/pexpect-dpty/"); |
| import pexpect, proc_check, shellio, signal, time, threading |
| |
| |
| #Ensure the shell process is terminated |
| def force_shell_termination(shell_process): |
| c.close(force=True) |
| |
| # pulling in the regular expression and other definitions |
| definitions_scriptname = sys.argv[1] |
| def_module = imp.load_source('', definitions_scriptname) |
| logfile = None |
| if hasattr(def_module, 'logfile'): |
| logfile = def_module.logfile |
| |
| # spawn an instance of the shell |
| c = pexpect.spawn(def_module.shell, drainpty=True, logfile=logfile) |
| atexit.register(force_shell_termination, shell_process=c) |
| |
| # set timeout for all following 'expect*' calls to 2 seconds |
| c.timeout = 2 |
| |
| # ensure that shell prints expected prompt |
| assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt" |
| |
| |
| |
| # run a command |
| c.sendline("sleep 60") |
| |
| # The following call is necessary to ensure that the SIGTSTP |
| # we are sending below via 'sendcontrol' reaches the 'sleep' child. |
| # This is NOT a bullet-proof fix, you may fail on occasion! |
| time.sleep(1) |
| |
| |
| #checks the number of active child processes |
| #using a timeout based process count |
| proc_check.count_children_timeout(c, 1, 1) |
| |
| #checks the number of active child processes |
| #at this moment in time |
| proc_check.count_active_children(c, 1) |
| |
| |
| |
| # send SIGTSTP to 'sleep' |
| c.sendcontrol('z') |
| |
| # shell should pick up that 'sleep' was stopped and respond with job status |
| # it should output a line such [6]+ Stopped sleep 60 |
| (jobid, statusmsg, cmdline) = \ |
| shellio.parse_regular_expression(c, def_module.job_status_regex) |
| assert statusmsg == def_module.jobs_status_msg['stopped'], "Shell did not report stopped job" |
| |
| # move job into foreground |
| c.sendline(def_module.builtin_commands['fg'] % jobid) |
| |
| # when moving a job in the foreground, bash outputs its command line |
| assert c.expect_exact(cmdline) == 0, "Shell did not move job in foreground" |
| |
| |
| |
| # send SIGINT |
| c.sendintr() |
| |
| #check that the prompt prints |
| assert c.expect(def_module.prompt) == 0, "Shell did not print expected prompt" |
| |
| |
| |
| #exit |
| c.sendline("exit") |
| assert c.expect_exact("exit\r\n") == 0, "Shell output extraneous characters" |
| |
| shellio.success() |